The "softness" of your predicted global depletion rates compares to what you have shown here for the USA. My problem with global versus country-specific depletion rates is the fact that when the USA peaked, oil I suspect became increasingly more expensive to extract from US wells. So, would it not be the case that American oil consumers would buy up more cheaper and foreign oil even if domestic oil production could be increased? The result being companies profits drop and wells are capped or throttled?

This would have the effect of "softening" the USA depletion curve due to cheaper alternatives abroad.

Now for the global situation, at a global peak, there is no cheap seller of last resort to go to. The world cannot go off-planet to obtain cheaper crude to soften the depletion curve like the USA did.

You only have two options, pump faster and accelerate the depletion or cut back in terms of recession or alternatives.

The truth as ever will be in between these.

That would seem therefore to suggest depletion rates will be more like 7%+. It seems in the case of recently peaked Britain they have decided just to pump and pump or perhaps Peak Oil has already forced them too?